1. How does the battery output electrical energy to the outside world?
When the battery outputs electrical energy to the outside, the external circuit is electronically conductive, relying on the directional movement of the electron to transfer the charge; between the two stages inside the battery is ion conduction, relying on the directional movement of the ions to transfer the charge; on the electrode interface, relying on It undergoes an electrochemical reaction to transfer the charge, ensuring that the current passes through the interface of the electrode.
2. Why is the output voltage lower than the theoretical or open circuit voltage when the battery is discharged?
Because there is a certain internal resistance inside the battery, when there is current passing, the internal resistance causes an internal pressure drop. As the discharge progresses, the internal resistance of the battery increases and the voltage will gradually decrease.
3. Why should the discharge termination voltage of the battery be specified?
Since the battery is not required to be used in the ocean, the discharge conditions will be different. In order to prevent the battery from being prematurely hungry and prolong the battery life, it is necessary to specify the discharge termination voltage for different use requirements and discharge conditions. In addition, in order to compare or discriminate the discharge performance of the battery or check the capacity of the battery, it is necessary to specify the discharge termination voltage.
4. Charge and discharge methods commonly used in lithium ion batteries
Constant current constant voltage charging, constant current discharge.
5. Battery short circuit
The electronic conduction formed by the two electrodes inside the battery is called short circuit of the battery or internal short circuit of the battery. The internal short circuit of the battery often causes the battery to be scrapped.
6. Battery external short circuit
The load resistance between the positive and negative current collector terminals of the battery is negligible compared to the internal resistance of the battery. This condition is called external short circuit of the battery.
7. Battery self-discharge
During the storage of the battery during charging, the battery is self-discharged due to the capacity loss caused by the spontaneous reaction inside the battery.
8. Can you avoid self-discharge of the battery?
No. In theory, the electrodes in the battery are in a thermodynamically unstable state, and self-discharge is unavoidable, but if the measures are taken properly, the self-discharge can be minimized.
9. Turn into
The process of increasing the electrochemical activity of the electrode raw material by the charge and discharge method is called formation.
10. Why do you want to classify the capacity?
The battery is usually formed in series. In order to maintain the consistency of the battery capacity in series, it is necessary to check and classify the actual capacity of the unit battery to ensure the use effect of the battery after being connected in series.